Drill Chuck GEKO G00511 13 mm (3/8") self-tightening

GEKO G00511 13 mm (3/8") self-tightening drill chuck is a compact accessory designed to hold round and hex shank drill bits securely in hand drills and compatible power tools. With a 13 mm capacity and self-tightening mechanism, the chuck allows quick bit changes without a key and provides reliable clamping force for drilling into wood, light metal and composite materials. Its standard 3/8" fitting makes it suitable for a wide range of portable drills and assembly tools that accept the corresponding shank.

Advantages

The self-tightening design eliminates the need for a key, enabling faster bit changes and reduced downtime during tasks. The 13 mm jaw capacity accommodates common drill bit sizes used in DIY, woodworking and light metalworking. Constructed for consistent gripping, the chuck reduces slippage under moderate loads and improves drilling accuracy. Its universal-fit shank offers compatibility with many hand-held drills and small bench tools.

Suitable for

• Home improvement and general DIY drilling
• Woodworking tasks such as pilot hole drilling and dowel preparation
• Light metal drilling and sheet metal jobs
• Assembly work where quick bit changes are required

Key specifications

• Maximum jaw capacity: 13 mm (3/8")
• Type: self-tightening (keyless) drill chuck
• Compatibility: standard 3/8" shank for hand drills and compatible power tools
• Suitable bit shank forms: round and hex
• Typical applications: drilling, light assembly, and general-purpose fastening tasks

How to use

Open the chuck jaws by rotating the outer sleeve counterclockwise, insert the drill bit until it seats firmly, then rotate the sleeve clockwise to tighten. For self-tightening chucks, applying light forward pressure while running the drill at low speed helps the mechanism grip the bit securely. Ensure the bit is centered and fully seated before operating at higher speeds. Regularly inspect the jaws for wear and remove debris to maintain reliable clamping.

Usage recommendations

Use the chuck within its 13 mm capacity range and avoid forcing oversized bits. For intensive or high-torque metalworking, consider a keyed chuck or heavier-duty accessory. Keep the chuck clean and periodically lubricate the thread area with a light machine oil to preserve smooth operation and prolong service life.